Nah, that would just be imbalanced. That would mean that you can stack 4 armies while sieging a stronghold with 4 retry's might it fail, while he only has 1.

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"The flower of friendship blooms even in hell. On the sand where waves come and go, it leaves its petal as a memento. We will make it bloom again someday, The Okama Way!" - Mister 2, Bon Clay